stlink-v1: fix memory writes

implement stlink_usb_send and use it to fix stlink_usb_write_mem

using two calls to stlink_usb_recv is inappropriate since each
call issues a SG command on stlink-v1, resulting in errors

Change-Id: I52ff9ee8f5d9ae0d47356477468eb98952205c99
Signed-off-by: Szymon Modzelewski <szmodzelewski@gmail.com>

diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c
index f7ad7c034588eb137208bea26acbec1006ce7e79..e3c005e4ad42997d42009cd2c985d1a9ca8e477a 100644 (file)
--- a/src/jtag/drivers/stlink_usb.c
+++ b/src/jtag/drivers/stlink_usb.c
@@ -368,6 +368,13 @@ static int stlink_usb_recv(void *handle, const uint8_t *cmd, int cmdsize, uint8_
        return stlink_usb_xfer(handle, cmd, cmdsize, STLINK_RX_EP, rxbuf, rxsize);
 }
 
+/** */
+static int stlink_usb_send(void *handle, const uint8_t *cmd, int cmdsize, uint8_t *txbuf,
+                   int txsize)
+{
+       return stlink_usb_xfer(handle, cmd, cmdsize, STLINK_TX_EP, txbuf, txsize);
+}
+
 /** */
 static void stlink_usb_init_buffer(void *handle)
 {
@@ -971,12 +978,7 @@ static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len,
        h_u32_to_le(h->txbuf + 2, addr);
        h_u16_to_le(h->txbuf + 2 + 4, len);
 
-       res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, 0, 0);
-
-       if (res != ERROR_OK)
-               return res;
-
-       res = stlink_usb_recv(handle, (uint8_t *) buffer, len, 0, 0);
+       res = stlink_usb_send(handle, h->txbuf, STLINK_CMD_SIZE, (uint8_t *) buffer, len);
 
        if (res != ERROR_OK)
                return res;
@@ -1034,12 +1036,7 @@ static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
        h_u32_to_le(h->txbuf + 2, addr);
        h_u16_to_le(h->txbuf + 2 + 4, len);
 
-       res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, 0, 0);
-
-       if (res != ERROR_OK)
-               return res;
-
-       res = stlink_usb_recv(handle, (uint8_t *) buffer, len, 0, 0);
+       res = stlink_usb_send(handle, h->txbuf, STLINK_CMD_SIZE, (uint8_t *) buffer, len);
 
        if (res != ERROR_OK)
                return res;